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Title: Instruments For The Determikation Of Specific Gravity Of Gas
Author: m. S. Morrison
Source: 1984 International School of Hydrocarbon Measurement
Year Published: 1984
Abstract: Ccnputation of natural gas flow voliime, when neasured by o r i f i c e rteter, is made by using the formila Qb C X v*iere Qh is the quantity, Btf is the differential, and Pf is the absolute static pressure, with C being a constant. the constant C is only constant for a certain specified set of conditions, and in practice is made up of numerous factors including the basic orifice factor, Reynolds nunfcer factor, expansion factor, pressure base factor, tenperature base factor, f Icwing tenperature factor, specific gravity factor, siiercoTpressibility factor, arK3 manometer factor. In order to determine these factors, the values of the quantities fron vriiich they are derived must either be assumed or measured. This p)er will deal with those instruments measuring specific gravity. (For further details of the flow ccirputation refer to A.G.A. Gas Measurement Report No. 3)

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